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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 969 · 40 sums
TalentJR

The method (Column by column): Line up ones, tens and hundreds. Add from the right; 10 or more → carry 1 to the next column. Subtract from the right; top digit smaller → borrow 1 from the next column. Missing number in an addition = total − the number you know.

NameDateTime takenScore ___ / 40
  1. 1.643 − 245 =
  2. 2.A train has 746 people in the front coaches and 229 people in the back coaches. How many people are on the train?
  3. 3.? + 333 = 650
  4. 4.? + 746 = 899
  5. 5.613 + 309 =
  6. 6.835 + 138 =
  7. 7.809 − 739 =
  8. 8.948 − 434 =
  9. 9.714 + 195 =
  10. 10.A train has 782 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  11. 11.476 − 408 =
  12. 12.A train has 368 people in the front coaches and 510 people in the back coaches. How many people are on the train?
  13. 13.A school has 670 children. 233 of them are girls. How many boys are there?
  14. 14.490 − 162 =
  15. 15.606 + 238 =
  16. 16.? − 278 = 19
  17. 17.? − 515 = 348
  18. 18.379 − ? = 273
  19. 19.A school has 565 children. 388 of them are girls. How many boys are there?
  20. 20.A train has 229 people in the front coaches and 140 people in the back coaches. How many people are on the train?
  21. 21.A train has 819 people in the front coaches and 127 people in the back coaches. How many people are on the train?
  22. 22.817 + ? = 950
  23. 23.A school has 772 children. 519 of them are girls. How many boys are there?
  24. 24.? + 868 = 986
  25. 25.235 − 211 =
  26. 26.? − 263 = 157
  27. 27.868 + 100 =
  28. 28.443 − 209 =
  29. 29.? − 149 = 354
  30. 30.? − 507 = 19
  31. 31.? − 203 = 156
  32. 32.938 − 771 =
  33. 33.965 − 192 =
  34. 34.629 − 442 =
  35. 35.225 + 373 =
  36. 36.A train has 365 people in the front coaches and 530 people in the back coaches. How many people are on the train?
  37. 37.A train has 875 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  38. 38.A school has 325 children. 133 of them are girls. How many boys are there?
  39. 39.458 − 115 =
  40. 40.513 + ? = 855

Answer key

  1. 398
  2. 975
  3. 317
  4. 153
  5. 922
  6. 973
  7. 70
  8. 514
  9. 909
  10. 897
  11. 68
  12. 878
  13. 437
  14. 328
  15. 844
  16. 297
  17. 863
  18. 106
  19. 177
  20. 369
  21. 946
  22. 133
  23. 253
  24. 118
  25. 24
  26. 420
  27. 968
  28. 234
  29. 503
  30. 526
  31. 359
  32. 167
  33. 773
  34. 187
  35. 598
  36. 895
  37. 994
  38. 192
  39. 343
  40. 342

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